He has successfully defended his PhD degree in December, 2022 and currently he is working as a Research Associate at IIT Roorkee
Constructed Wetlands are a natural, low-cost, eco-technological biological wastewater treatment technology that mimics natural wetland ecosystem processes and is currently considered a potential alternative or additional system for wastewater treatment. Constructed wetlands are the alternatives for the wastewater treatment system that improves water quality by utilizing natural processes involving wetland vegetation, soils, and associated microbial communities. The present study designed vertical subsurface flow constructed wetlands to induce subsurface flow through a porous medium. The systems could also be described as the "rock-reed-filters," root-zone systems," and "vegetated submerged bed systems." Having various advantages of constructed wetlands, specific challenges restrict the wastewater's purification. Therefore, to overcome the issue of the limiting factors and maximize the output, refinements in design with amendments were done to enhance the purification capability of the systems. The work is based on reducing pollutants via distinct strategies to assess the systems comparatively, and the strategies opted for during the study period. In total, two plants (Typha sp. and Colocasia), six support matrix materials (boulders, coarse gravel, fine gravel, biochar, and river bottom sand), and two DO maintenance strategies (intermittent aeration and tidal flow operation) were implied. The Biochar used as a substrate material was derived from cow dung, which was incorporated into the substrate matrix to enhance the working of the CWs to reduce the pollutants.
Moumita Dikshit completed Graduation from Calcutta University and Masters from Vidyasagar University, West Bengal.
Pollution is the contamination of the environment with harmful substances. Amongst various types of pollution water pollution is one of the major issues in India. Wastewater is sewage and non-potable water that flows back into the environment, and most of it is untreated. In the majority of areas, untreated wastewater is discharged directly into the local surroundings and water bodies. This leads to the contamination of surface as well as sub-surface water, having negative effects on the environment and human health. The increasing world population, urbanization, and industrialization are driving global increases in wastewater production. Wastewater comprises significant amounts of chemical energy primarily in the form of organic molecules (in particular lipids), which are currently not being recovered comprehensively. So now it’s time to look into alternative technologies for the purification of water. As per the previous study, this treatment is convenient and may be more sufficient for the production of clean, usable water at a low cost, and at the same time, biofuel can also be produced. An attempt has been made for the electrolysis of wastewater and production of green fuel with little finance, less maintenance, and easy availability.
Karuna Singh completed Graduation from the University of Delhi and Masters from Banaras Hindu University.
Pollution due to rapid urbanisation and industrialisation continues to be of great concern worldwide. In the past few decades technological and scientific advancement have made a significant impact on human lifestyle which led to an exponential increase in use of agricultural pesticides, pharmaceuticals, personal care and household products (termed as contaminants of emerging concern, CECs). Due to their indiscriminate use and improper disposal, these contaminants readily enter into the environment. The severity of CECs is attributed to their persistence in environment and/ or accumulation in living organisms that causes adverse ecotoxicological effects. Recent studies have investigated the presence of CECs in drinking water, air, soil, plants, humans etc., however, they pose a great threat to living organisms as some of them are categorised as potential carcinogen. Currently, in India conventional water treatment methods are not effective in eliminating these contaminants because of their complex chemistry. Even though the use of personal care products, pesticides, pharmaceuticals is increasing in country, on the other hand, studies related to their persistence in environment, interaction with other contaminants, transformation products/ degradation studies and human health risk analysis are scarce. Therefore, the objective of the study is to assess the prevalence/presence of CECs in different environmental settings (water, air and soil). Subsequently, safe and economical methods for their removal/ degradation will be carried out together with health risk assessment
Shruti Gulia completed Graduation from the University of Delhi and Masters from Banaras Hindu University.
Air pollution is a major problem all over the world in both developed and developing countries. Rapid increase in population and demand for energy has resulted in emission of toxic air pollutants that affect the surrounding environment as well as human health. . Air pollution was considered to be a local problem with large number of point sources but due to the application of tall stacks, biomass burning and long range transport of pollutants, it has become a regional to global problem which contributes to climate change. The observational evidence indicates that recent regional changes in climate, particularly temperature increases, have already affected a diverse set of physical and biological systems in many parts of the world. Due, excessive air pollution concentrations and patterns, climate is changing in several urbanized areas of the world with a significant effect on health. Most of the developing countries, including India, have experienced a drastic decline in air quality due to rapid economic growth over the last three decades. There is a need for timely information about changes in the air pollution levels in cities for adopting precautionary measures. Keeping this in view, an attempt has been made to develop a model which will be useful to obtain air quality information and its relation with climate change directly from observed data and remotely sensed data easily and quickly using mathematical modelling.
Rakesh Choudhary completed B. Tech in Civil Engineering from Netaji Subhash University of Technology West Campus Delhi-110073.
Over the past few decades, there has been a lot of research on the potential of algal biomass as a source of liquid and gaseous biofuels. The emerging research shows that algae have the potential to become a viable aquatic energy crop with a higher energy potential than that from either terrestrial biomass but their utilization as an energy source is still low around the world. And the increasing heap or collection of municipal solid waste is a burden to our society, health, and environment. In India, the biodegradable fraction of the organic fraction of municipal solid waste can be used as feedstock for enhanced biogas production, which is available in any season of the year. A set of proportional blends of two-stage Anaerobic co-digestion of algal biomass and organic fraction of municipal solid waste as a feedstock resource may enhance biogas yield. With the help of obtained data Modelling, LCA, and parameter optimization for performance evaluation of Enhanced biogas production with substrates as an organic fraction of MSW & Algae through Anaerobic Digestion with the Applications of Data Science and Machine learning could be done.
Sudal Kumar completed M.Sc. in Environmental Science from the GJUS&T Hisar and MTech in Nanoscience and Technology from GJUS&T Hisar.
An ecosystem is the functional combination of abiotic and biotic components, these two are so nicely knitted fabrics that no one can view a separate. A slight decline of one component will affect the entire combination of different factors. A healthy and sustainable ecosystem requires multiple similar factors of dependence, number of such factors is directly proportional to the health and sustainability of ecosystem. Change in the habitats of pollinators and seed spreaders due to climate change and anthropogenic activities disturbed the pin point equilibrium of many ecosystems. In recent many rivers and ecosystems are under stress due to dry weather conditions in Europe. In view of changing climate and global warming, we must have to prepare us against threats of degradation and distruction of well established ecosystems. We have to work in advance to built more resilient, more diverse and sustainable ecosystems, which can withstand in more drastic conditions or increased temperature of globe. We have to equally study, gather information about species of microbes their interactions with rhizosphere and pollinators, seed spreaders and other dependent species on the above ground part of the ecosystems. We have to work on more diverse interactions among both the below and above ground components. In this study we planned, designed some ecosystems which were vanished in past due to various stress factors, and loss of dependent species. We have recreated such degraded ecosystem on almost a patch of desert and studied the interactions of various components essential for sustainability and survival.
Shruti Kaushik completed Graduation from University of Delhi and Masters from Punjab University.
Environmental impact of fire Fire outbreaks have been common and acknowledged risks in our society for the past many years. Fire outbreaks are common and can occur due to natural or anthropogenic reasons such as lighting explosions, riots, terrorism, accidents, short circuits, etc. Fires result in a direct and immediate impact on society along with the community from the toxic effluents. Smoke results in most fire-based deaths due to these effluents. Fire results in significant loss of lives and property resulting in a huge economical loss. However, fire also has certain negative consequences on the environment. Negative impacts spatially can be local, regional, or global whereas, temporal consequences can be gradual as well as persistent based on certain factors. Fire-borne pollutants release toxic combustion gases during a fire or post-fire effects can be seen when the fire is doused off using water and additives producing toxic runoff. Further, contaminants released if not contained properly easily find their way into the environment using different transport pathways depending on the contaminant’s physicochemical properties and reaction processes. Therefore, environmental impact assessment of fire-borne contaminants becomes an important step with respect to fire accidents. The objective of this study will be to optimize the methods to monitor the distribution, fate, and transport of different fire-based effluents.
He is currently working as Deputy Head, Secretary General Office, The Commonwealth Secretariat, London
Climate change will have an impact on the global economy. Attempting to understand and quantify these impacts is a complicated exercise subject to significant error. Despite this, from what we know today, we can make inferences about how global warming will influence various economic factors. More extreme weather has the potential to weaken economic growth through damage to the capital stock and labor supply, and labor productivity will weaken as the world economy adjusts to higher temperatures. Inflation will rise through food, energy, and insurance costs. Monetary policy will be limited as it attempts to combat the pressures of climate change. Successful mitigation policies will necessitate actions from all parties. The insurance industry is already moving to incorporate some of these costs. Still, without a broader coordinated, correct policy response, the world economy is unlikely to factor in one of the most significant negative externalities ever faced. Recognizing that quantifying the impact of climate change on shareholder’s investments is critical in creating an incentive to act, we will be looking to incorporate climate change effects into an extended long-run return forecast for different asset classes.
|Year Of Passing
|Dr. Naveen Chand, Ph.D.
|Research Associate at IIT Roorkee